Question

Xerophthalmia is caused due to the deficiency of
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D

Answer 1

Hint: Xerophthalmia is an ailment where the eye neglects to create tears, which is at times used to depict that condition, despite the fact that there might be different causes. Xerophthalmia normally infers a dangerous dryness of the conjunctival epithelium because of dietary nutrient A lack—an uncommon condition in created nations, yet at the same time causing a lot of harm in non-industrial nations.

Complete answer:
The harm to the cornea in nutrient A related xerophthalmia is very not quite the same as harm to the retina at the rear of the globe, a kind of harm which can likewise be because of absence of nutrient A, yet which is brought about by absence of different types of nutrient A which work in the visual framework. Xerophthalmia from hypovitaminosis An is explicitly because of absence of the hormone-like nutrient A metabolite retinoic corrosive, since (alongside certain development hindering impacts) the condition can be switched in nutrient An inadequate rodents by retinoic corrosive supplementation (anyway the retinal harm proceeds). Since retinoic corrosive can't be decreased to retinal or retinol, these consequences for the cornea must be explicit to retinoic corrosive. This is with regards to retinoic corrosive known necessity for good well being in epithelial cells, for example, those in the cornea.

So,the correct answer is "option A".

Note:
The condition isn't innate and creates throughout the span of a couple of months as the lacrimal organs neglect to deliver tears. Different conditions engaged with the movement previously expressed incorporate the presence of Bitot's spots, which are clusters of keratin flotsam and jetsam that develop inside the conjunctiva and night visual deficiency, which goes before corneal ulceration and complete visual deficiency.